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// SPDX-License-Identifier: Apache-2.0
/**
* @module Generators/Strategies/MotionsStrategy
* @description Article strategy for the Motions article type.
* Fetches voting records, patterns, anomalies and parliamentary questions
* over a rolling 30-day window then renders a voting-behaviour overview.
*/
import type { EuropeanParliamentMCPClient } from '../../mcp/ep-mcp-client.js';
import { ArticleCategory } from '../../types/index.js';
import type {
LanguageCode,
VotingRecord,
VotingPattern,
VotingAnomaly,
MotionsQuestion,
EPFeedData,
} from '../../types/index.js';
import { MOTIONS_TITLES, getLocalizedString } from '../../constants/languages.js';
import { fetchMotionsData, fetchEPFeedData } from '../pipeline/fetch-stage.js';
import {
generateMotionsContent,
buildPoliticalAlignmentSection,
buildAdoptedTextsSection,
PLACEHOLDER_MARKER,
} from '../motions-content.js';
import { buildDeepAnalysisSection } from '../deep-analysis-content.js';
import {
buildVotingAnalysis,
buildVotingSwot,
buildVotingDashboard,
} from '../analysis-builders.js';
import { buildSwotSection } from '../swot-content.js';
import { buildDashboardSection } from '../dashboard-content.js';
import type { ArticleStrategy, ArticleData, ArticleMetadata } from './article-strategy.js';
/** Keywords shared by all Motions articles */
const MOTIONS_KEYWORDS = [
'European Parliament',
'motions',
'voting records',
'party cohesion',
'parliamentary questions',
] as const;
/** Number of days to look back when fetching motions data */
const MOTIONS_LOOKBACK_DAYS = 30;
// ─── Data payload ─────────────────────────────────────────────────────────────
/** Data fetched and pre-processed by {@link MotionsStrategy} */
export interface MotionsArticleData extends ArticleData {
/** Start of the 30-day look-back window */
readonly dateFromStr: string;
/** Voting records for the period */
readonly votingRecords: readonly VotingRecord[];
/** Voting patterns for the period */
readonly votingPatterns: readonly VotingPattern[];
/** Voting anomalies detected in the period */
readonly anomalies: readonly VotingAnomaly[];
/** Parliamentary questions raised in the period */
readonly questions: readonly MotionsQuestion[];
/** EP feed data for enrichment (when available) */
readonly feedData?: EPFeedData | undefined;
}
// ─── Strategy implementation ──────────────────────────────────────────────────
/**
* Article strategy for {@link ArticleCategory.MOTIONS}.
* Aggregates voting data over a rolling 30-day window and surfaces
* patterns, anomalies and parliamentary questions.
*/
export class MotionsStrategy implements ArticleStrategy<MotionsArticleData> {
readonly type = ArticleCategory.MOTIONS;
readonly requiredMCPTools = [
'get_voting_records',
'analyze_voting_patterns',
'detect_voting_anomalies',
'get_parliamentary_questions',
'get_adopted_texts_feed',
'get_parliamentary_questions_feed',
] as const;
/**
* Fetch all motions data for the last 30 days.
*
* @param client - MCP client or null
* @param date - ISO 8601 publication date (end of the look-back window)
* @returns Populated motions data payload
*/
async fetchData(
client: EuropeanParliamentMCPClient | null,
date: string
): Promise<MotionsArticleData> {
const dateFrom = new Date(`${date}T00:00:00Z`);
dateFrom.setUTCDate(dateFrom.getUTCDate() - MOTIONS_LOOKBACK_DAYS);
const dateFromParts = dateFrom.toISOString().split('T');
Iif (!dateFromParts[0]) {
throw new Error('Invalid date format generated for motions look-back window');
}
const dateFromStr = dateFromParts[0];
// Fetch voting data and EP feed data in parallel
const feedDateRange = { start: dateFromStr, end: date };
const [motionsDataResult, feedData] = await Promise.all([
fetchMotionsData(client, dateFromStr, date),
fetchEPFeedData(client, 'one-month', feedDateRange),
]);
const { votingRecords, votingPatterns, anomalies, questions } = motionsDataResult;
return {
date,
dateFromStr,
votingRecords,
votingPatterns,
anomalies,
questions,
feedData,
};
}
/**
* Build the motions HTML body for the specified language.
*
* @param data - Motions data payload
* @param lang - Target language code used for editorial strings
* @returns Article HTML body
*/
buildContent(data: MotionsArticleData, lang: LanguageCode): string {
const base = generateMotionsContent(
data.dateFromStr,
data.date,
[...data.votingRecords],
[...data.votingPatterns],
[...data.anomalies],
[...data.questions],
lang
);
const adoptedTextsSection = data.feedData?.adoptedTexts
? buildAdoptedTextsSection(data.feedData.adoptedTexts, lang)
: '';
const alignmentSection = buildPoliticalAlignmentSection([...data.votingRecords], [], lang);
const analysis = buildVotingAnalysis(
data.dateFromStr,
data.date,
data.votingRecords,
data.votingPatterns,
data.anomalies,
data.questions
);
const deepSection = buildDeepAnalysisSection(analysis, lang, 'en');
const swotData = buildVotingSwot(data.votingRecords, data.votingPatterns, data.anomalies, lang);
const swotSection = buildSwotSection(swotData, lang);
const hasRealVotingData = data.votingRecords.some((r) => r.result !== PLACEHOLDER_MARKER);
const dashboardData = hasRealVotingData
? buildVotingDashboard(data.votingRecords, data.votingPatterns, data.anomalies, lang)
: null;
const dashboardSection = buildDashboardSection(dashboardData, lang);
// Inject at the explicit <!-- /article-content --> marker so the section
// stays inside the .article-content styling scope. The marker is always
// emitted by generateMotionsContent as the last child of that wrapper and
// is removed from the final HTML during this replacement.
const injection =
adoptedTextsSection + (alignmentSection || '') + deepSection + swotSection + dashboardSection;
Eif (injection) {
return base.replace('<!-- /article-content -->', `${injection}\n`);
}
return base.replace('<!-- /article-content -->', '');
}
/**
* Return language-specific metadata for the motions article.
*
* @param data - Motions data payload
* @param lang - Target language code
* @returns Localised metadata
*/
getMetadata(data: MotionsArticleData, lang: LanguageCode): ArticleMetadata {
const titleFn = getLocalizedString(MOTIONS_TITLES, lang);
const { title, subtitle } = titleFn(data.date);
return {
title,
subtitle,
keywords: [...MOTIONS_KEYWORDS],
category: ArticleCategory.MOTIONS,
sources: [],
};
}
}
/** Singleton instance for use by the strategy registry */
export const motionsStrategy = new MotionsStrategy();
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